From nobody Fri Sep 25 12:33:36 2026 Received: from mail-wm2-f12.google.com (mail-wm2-f12.google.com [74.125.225.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 035823644BE for ; Sat, 12 Sep 2026 07:34:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.225.140 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789198490; cv=none; b=rAM1W7viJbd1ENjp5CLsT5H/jd00gbRmx6agsf1UhkzaCg4L+AWUB+uzrwmuEbGAvgvFOHaUJj4Pzs6TvFLWKcAeUFYQUetMhVA6BJ5LX5pejJDv+Zsvg+jCnOhumE5QKqdwYlBVNfBG0Hv+AevqaQ2sjMoHL/qiONAa8FJtquI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789198490; c=relaxed/simple; bh=FuiOWbW64EkXmhSCCZESWu46wUZGuIbP+topqzKMfsE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=HHh8s+uGGRktTwRZXcNsjrSPW3mLJECutEbo9VKDGEA1X2jiiOfDM/GaGMDnI2LJFi3p8HtO5jJSNAWIKVYYJjpea4JoeE4p6z8U0wIhTf/q2Rr+Ph3kDkZ8K14s00SeeYCrC0QRw19RCIYfW39Oydt4zlOfv7jEG2gcJRApvII= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=JXhbaisA; arc=none smtp.client-ip=74.125.225.140 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="JXhbaisA" Received: by mail-wm2-f12.google.com with SMTP id 5b1f17b1804b1-49ccff31419so2462095e9.3 for ; Sat, 12 Sep 2026 00:34:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789198487; x=1789803287; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=KKzOKf39vUQCKlSSJr14iXhgJoohToEd5zg/sTn5zfI=; b=JXhbaisApL+UoslNJ2RwfWxvewaX82OBTVTCydSrgN73Bq62uPxbzKMwwwx6b7oa7j 3mtyUw6MShFcX9mKfKMLmR/nNpF6R2aNK1rHTFE+Cz5AODL1MpUEigMHsWQjjXQHpJow +BkZeeTpfAu7XIEIAhgy0aAo0kdBwYM1cOe2ttm3D2Im0B4Jo0AoM8xTjaMM4jS9IxJC QGVGykwuxm/XP51HwnFtVTOdW14JPnaQVm5hQnqd/RqAB6FyTkx/aHhhwp73b3GzmDGz E5BbI+RojynlmmwWSr9K4Y6cyC71r1BsYsp/fBy+IpkaK/72mQGGkLmqRlSAV0typOLa M7Qw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1789198487; x=1789803287; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=KKzOKf39vUQCKlSSJr14iXhgJoohToEd5zg/sTn5zfI=; b=QD4cW/cNHV5l1SnRTTQxbbYYzXi36kvJmmmQGuK7mecv72HbMC6pRE9CtdtpPZ/9HS 0xZkq08pF8BD+tuu7jI9gU09d+qsLdC4rlk/vtO8mjaIcNF1jUzzEtwzQQWgUNe8scwz VGy8GdrWdbbFCpGRoDoO49rtNzfA3IVKAA9D09/UW5qEdmPbdZ0/9/hQVwxVFDZSA9Fo apf25G/Ja+Az+DIpGoduJMrdcejCMrS8spOdkXNVb1c9RtHTvNMtjcYxwypycJsghhPq TEU2dUVrRr+Ll7SlXrRH1jIlFAD55vZwA+swD0iGMRo6lr1DMY6uqEzDYuqwaQv7DYcl hnQg== X-Forwarded-Encrypted: i=1; AKwUvBwA3SdIfJ9/p9V4MJz1ZO+lNC81J0CAI+yKmobghDkx6ZZyQnIsPrJOrVH3Vq3jcFSAWIxYjCJqQEmkAwA=@vger.kernel.org X-Gm-Message-State: AFuF++lNsPpvieWT/x/lG7yuHJ6TZ0uxlHmPRtvH1kPU9JqGGc7BruKC faWotwrJWJQ6kvsGy5J3lMt61cImnm2Z0iM9Ic1vBs+b75vCs9bQBdI0 X-Gm-Gg: AYBFou3t+KIhqcsqZhv6Oq7Ag5qArttyYRrtgO7fra9g2+icvsjMvddrsckHVLNll8U gHk8C4rwcxU15PesQphWWQ+sVIqn7RK0U3LLJ2+XSJb+Z1ztKOWj/TYidGH49h3vvx2uLzJi9of d857Drj7NwI8EyXBokfP0n7nVyRIb14/1EtM6rcXvw7jqEYNXXsLOefG8z/iWZlqFxoJNEQ+tzT d9SfoKtghwVcH97PaWwNVJqZqvomV8OGrMuXMQ9R2m8ZTQ/DNwaqtmR85KlH23ZFsshWtCH0jf3 ZwrK5fSoAl5oqMu7iRGp1b+z2S6xXus0Ohnt8ydRwuoyny/h+zjtaSl/0hvaNm6DJqRAos1Efq4 rsc3QtZ+mnF//8k3GvyCTFrYqyYxDSTslD0vVyddUMYtJCFQje+Zt4UjHFFCeJrbyFcJTkNwhlE N1RGIv8VtaccVBOnwLWQAqtgAu+wf0NCVMOWz6rw32lSykvGMZ2/uzCibmtNZ/VwbcGSOOShzEW 910Ras4Wcvac/JdHvW87ZSB0uNQUdMvGG6QGrQba6FPPrSB+56iDMEPBGNWezrHNt9Q1zKzgI2w d4xu7qs8E5FoJ9NzFAZ1EOOJReE4Va8SZfVEvxA+FnRpCMKJ+jktTS1bjClPG4yTEWpApFkPU1U OcjukzUc= X-Received: by 2002:a05:600c:37c6:b0:49c:fa21:1c8b with SMTP id 5b1f17b1804b1-49e6cc1a4d0mr15498325e9.32.1789198487091; Sat, 12 Sep 2026 00:34:47 -0700 (PDT) Received: from localhost.localdomain (dynamic-2a02-3100-b260-f201-9983-e8c4-aff5-7a36.310.pool.telefonica.de. [2a02:3100:b260:f201:9983:e8c4:aff5:7a36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49e60ad0614sm147509485e9.10.2026.09.12.00.34.46 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sat, 12 Sep 2026 00:34:46 -0700 (PDT) From: Karl Mehltretter To: David Howells , Paulo Alcantara , Jonathan Corbet Cc: Karl Mehltretter , Shuah Khan , Randy Dunlap , Christian Brauner , netfs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] netfs: Document the remote size member and its accessors Date: Sat, 12 Sep 2026 09:34:44 +0200 Message-Id: <20260912073444.51152-1-kmehltretter@gmail.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" netfs_inode.remote_i_size was renamed to _remote_i_size and accessors were added to prevent torn accesses. The netfs library documentation still shows the old member name. Update the struct excerpt and member description. Direct readers to netfs_read_remote_i_size() and netfs_write_remote_i_size(), and state that writes require inode->i_lock. Fixes: 2c8f4742bb76 ("netfs: Fix potential for tearing in ->remote_i_size a= nd ->zero_point") Assisted-by: LLM Signed-off-by: Karl Mehltretter --- Documentation/filesystems/netfs_library.rst | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Documentation/filesystems/netfs_library.rst b/Documentation/fi= lesystems/netfs_library.rst index ddd799df6ce363d9c348b4f1e82d66b1b54bf4fd..0c9786ffe19240233ea0d8b725d= d8300b9f57759 100644 --- a/Documentation/filesystems/netfs_library.rst +++ b/Documentation/filesystems/netfs_library.rst @@ -195,7 +195,7 @@ structure is defined:: struct inode inode; const struct netfs_request_ops *ops; struct fscache_cookie * cache; - loff_t remote_i_size; + loff_t _remote_i_size; unsigned long flags; ... }; @@ -229,11 +229,14 @@ filesystem: Local caching cookie, or NULL if no caching is enabled. This field doe= s not exist if fscache is disabled. =20 - * ``remote_i_size`` + * ``_remote_i_size`` =20 The size of the file on the server. This differs from inode->i_size if local modifications have been made but not yet written back. =20 + Use netfs_read_remote_i_size() and netfs_write_remote_i_size() to access + this field. Hold inode->i_lock when writing it. + * ``flags`` =20 A set of flags, some of which the filesystem might be interested in: --=20 2.39.5 (Apple Git-154)